Thanks for the links . It is their product so they ought to know what will work . Since they recomend that process it ought to be okay . As I might have said , most of my experience was with activated acrylic enamel and I just have to go by that . It may be that over-reduction is okay with activated acrylic urethane . I can still see the other guys over reduced paint jobs that would not hold a shine after just a couple of months and mine were still holding a shine years later without ever having been waxed . The last car that I painted was for myself in 1985 and it was still shiny in 1997 when I sold it and it was the first car I painted with activated acrylic urethane .